Infertility is more common than most of us think. In fact, 1 out of every 6 couples, according to this CNN Health article, experiences infertility issues. With these statistics, you or someone you know will experience some form of infertility. This article provides a general overview of basic information that can be helpful in understanding the physical aspects of infertility.
http://www.cnn.com/2015/04/22/health/infertility-5-questions/index.html